One way to study non-perturbative effects is to lift type IIA string theory to M-theory [1]}, [2]}. Now the D4 and NS5 branes are all described by the same object, an M5 brane. The embedding of the M5 brane is related to the Seiberg-Witten curve and the factorization equation in the \({\cal N}=1\)  case. We thus obtain a beautiful geometric interpretation of many field theoretical quantities, mostly the chiral and topological ones. The goal for this section is to describe the \(r\)  vacua and the coincidence vacua in the MQCD framework. The MQCD curve shall provide further evidence for why the coincidence points are so special.
